JPH0323217Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a free rotation mechanism between a laser light guide base and a handpiece body in a laser handpiece mainly used for dental treatment.

(Prior Art) It is well known that laser treatment instruments have recently come into widespread use in fields such as dental treatment. This laser treatment device irradiates a laser beam introduced by a light guide from the tip of the treatment device, and uses the energy it possesses to heal the diseased area.In the field of dental treatment, it is a handpiece type device. is mainly used.

(Problem to be solved by the invention) The above laser handpiece roughly consists of a laser light guide base and a handpiece body connected to this, and the laser fiber as the laser light guide is inside a protective tube. The light guide base, the handpiece body, and the protection tube are generally integrated, so the control type In the case of handpieces, the head portion of the distal end is often used at various angles, and there is a problem in that twisting force is applied to the protective tube, causing damage to the protective tube.

The present invention was developed in view of the above, and aims to prevent damage to the protection tube of the laser fiber by rotatably connecting the laser light guide base and the handpiece body to each other. .

(Means for Solving the Problems) The configuration of the present invention for achieving the above object will be explained based on the attached embodiment drawings. FIG. 1 is a partially cutaway longitudinal sectional front view showing an example of the free rotation mechanism in the laser handpiece of the present invention, and FIG. 2 is a vertical sectional view taken along the line -- in FIG. That is, the free rotation mechanism of the laser handpiece of the present invention comprises a handpiece body 1 and a laser light guide base 2 coaxially connected to the base end of the handpiece body 1 in a male-female relationship.
and a laser fiber 3 inserted along the axis of the light guide base 2 and the main body 1 together.
and a gap 3 as a passage for cooling air around the laser fiber 3 in the light guide base 2.
1, a protection tube 4 which is fitted onto the mantle and is integrally fixed to the light guide base 2, and a connecting female cylinder 1 of the main body 1.
1 and the connecting male cylinder 21 of the light guide base 2.
and a cylindrical bearing 5 interposed to allow the light guide base 2 to rotate freely relative to each other.

(Function) A laser handpiece employing the free rotation mechanism configured as described above is, for example, a controller equipped with a laser beam reflector, a water inlet, an air jet, etc. at the tip of the handpiece body 1 as shown in the figure. The head portion 7 of the mold is attached and used for dental treatment or the like.
The operator grasps the handpiece body 1 and presses the head part 7.
The handpiece main body 1 is operated so that the laser beam axis irradiated from the handpiece is set at an appropriate angle depending on the condition of the affected area. At this time, the handpiece body 1 and the laser light guide base 2 are mutually rotatable via the cylindrical bearing 5, and the protection tube 4 is integrally fixed with the light guide base 2, so that the handpiece 1 Even when the operation is performed as described above, the light guiding base 2 and the protective tube 4 do not follow the same, and therefore, no excessive stress such as twisting is applied to the protective tube 4, and damage to the protective tube 4 is prevented.

(Example) Next, the present invention will be explained in further detail with reference to an example. 1st
In the figure, the laser light guide base 2 includes a light guide base main body 20, an elastic tube 41 tightly fitted in the middle of the circumferential body of the protective tube 4, and a structure around the elastic tube 41 as described above. a presser foot 22 that surrounds the light guide base main body 20 and is slidably fitted around the protective tube 4 along its longitudinal direction;
It includes a tightening screw 23 for applying a pressing force to.
The light guide base main body 20 has the male cylinder 21 at its tip, and a presser foot 22 is fitted into the space from the rear,
The elastic tube 41 is sandwiched between the presser foot 22 and the light guide base main body 20 via front and rear washers 42, 42. The tightening screw 23 is screwed into the base end of the light guide base main body 20, and its threading pushes the presser foot 22, causing deformation of the elastic tube 41 made of a silicon tube or the like.
The elastic tube 41 is compressed in the thrust direction by the pressing action of the presser foot 22 by operating the tightening screw 23, but since the outer periphery of the elastic tube 41 is surrounded and regulated by the light guide base body 20, it is compressed in the centripetal direction. The protective tube 4 and the light guide base main body 20 are firmly fixed together due to this contraction force. The tightening screw 23 deforms the elastic tube 41 in the centripetal direction via the presser foot 22, but if this deformation is excessive, the protective tube 4
Since this also deforms the air passage and the gap 31 serving as an air passage is closed, it is necessary to set a limit on the proper spiral stroke by making the tip of the light guide base body 20 hit against the light guide base body 20. Reference numeral 26 in the figure is a ring screw for preventing the tightening screw 23 from coming off backward, and is screwed onto the terminal end of the light guide base main body 20.

A water supply joint 241 is attached to the presser foot 22, and the water supply joint 241 and the presser foot 2
A conduit 242 drilled in the light guiding base 2 , a circumferential groove 243 recessed in the circumferential body of the conduit 242 , and a conduit 244 bored in the light guide base body 20 communicate with each other. A passage 24 is configured.

The handpiece body 1 includes a laser fiber 3 introduced from the laser light guide base 2 at its center, and a protective tube fitted around the fiber 3 with a gap 32 as a passage for cooling air. 13, and an inner case 14 for inserting and holding these.
and an outer case 15 fitted around the outer periphery of the inner case 14, and a head portion 7 is detachably connected to the distal end of the handpiece body 1 via an attachment/detachment operation ring 6. being done. The front end of the outer case 15 is screwed to the block base 60 for the detachable operation ring 6, and the rear end is screwed with a holding ring screw 151, which pinches the inner case 14 from the front and back to prevent it from coming off. We are trying to Further, a nut 211 is screwed onto the tip of the male cylinder 21 of the light guide base 2 in a state where it is locked to the inner wall of the inner case 14 and allows mutual rotation. Handpiece body 1
It is said that it is impossible to separate from each other in the axial direction. The gap 32 communicates with the gap 31 of the light guide base 2 and functions as a cooling air passage, and the outer periphery of the inner case 14 has a notch milled in the thrust direction. case 15
This space is positioned as the cooling water passage 12 that communicates with the cooling water passage 24 of the laser light guide base 2 via the circumferential groove 25.

A block base 6 is provided at the front end of the outer case 15.
A detachable operation ring 6 is provided through the block base 60, and the operation ring 6 is fitted onto the outer periphery of the block base 60 while being elastically biased forward by a compression spring 61, and has a small diameter section on its inner periphery. 62 and a large diameter portion 63 are arranged in parallel. Also, inside this ring 6, a plurality of joining balls 64 are engaged with the circumferential body of the block base 60 so as to be freely protrusive and retractable in the radial direction, and on the other hand, the balls 64 are attached to the base end of the head portion 7, which will be described later. A circumferential groove 711 into which the ball 64 is fitted is provided, and the inner surface of the small diameter portion 62 of the ring 6 fits into the ball 64.
When the ball 64 is in contact with the circumferential groove 71,
1, the handpiece main body 1 and the head part 7 are irremovably connected, and the ring 6 is moved back against the elasticity of the compression spring 61, and when the large diameter part 63 comes to the position of the balls 64... Ball 64...
movement in the centrifugal direction is allowed, and the handpiece body 1 and head section 7 can be separated from each other. Furthermore, the handpiece body 1 and the head portion 7 are designed so that they cannot rotate relative to each other in the connected state.
The joint portion is provided with a stop pin 65 and a slot 712 that engage with each other along the connection direction.

The head portion 7 includes the circumferential groove 711 and the slot 7.
12, a case 72 connected to the connecting base 71, and a reflector holding part 73. When the operating ring 6 is operated as described above to connect the connecting base 71, the tip of the laser fiber 3 is It extends to the vicinity of the reflector holding section 73. The reflector holding part 73 removably holds a reflector 74 for refracting the laser beam irradiated from the tip of the laser fiber 3 to an appropriate angle, and an irradiation port 731 is provided in the refracted optical path. A contact treatment probe 75 is detachably attached to this irradiation port 731. The laser fiber 3 in the connected head section 7 is fitted with another protection tube 16 that is separated from the protection tube 13, and a gap 33 is secured between the protection tube 16 and the fiber 3 as described above. This gap 33 communicates with the air conduit 32 of the handpiece body 1. The protective tube 16 and the fiber 3 are integrated at their distal ends by a tightening and holding member 17, but there is a notch 3
4 is formed, and the gap 33 communicates with the cavity of the reflector holding part 73 via this notch 34,
Further, the reflector holding portion 73 has an air jet port 732.
is provided, and the cooling air supplied from the laser light guide base 2 passes through each of the pipes to the jet port 732.
It is ejected to cool the affected area or the probe 75, etc. In addition, a groove 161 is recessed in the circumferential body of the protection tube 16 along its longitudinal direction, and one groove 161 is formed between the outer circumference of the protection tube 16 and the connecting tube 18 which is fitted onto the outer periphery of the protection tube 16 and fixed by screws. The block base 60
It communicates with the cooling water passage 12 of the handpiece body 1 through a communication hole 601 and a circumferential groove 602 drilled in the body, and the cooling water supplied from the passage 12 flows through the water inlet 721 provided in the case 72 of the head part 7. It is ejected to further cool the affected area or the probe 75, etc.

As mentioned above, the handpiece body 1 and the head part 7
Since a passage for cooling water is formed in the cooling water passage, each component must be connected in a watertight manner, and an O-ring 8 is provided as an effective member for fitting into each component. There is. Furthermore, when used for dental treatment, etc., the handpiece body 1 and head section 7 are subjected to autoclave processing, but it is desirable that the O-rings 8 are made of a heat-resistant material so as to withstand the processing temperature. Adopted.

In the above embodiment, a contra-type handpiece was used as an example, but it is also possible to apply the present invention to a straight-type handpiece. Furthermore, it is of course possible to use the above-mentioned handpiece as a non-contact type. It goes without saying that other changes may be made without departing from the scope of the present invention.

(Effect of the invention) As described above, the free rotation mechanism of the laser handpiece of the present invention is such that the handpiece body and the laser light guide base are mutually rotatable, and moreover, the handpiece body and the laser light guide base are inserted into the laser light guide base. Since the protective tube of the laser fiber and the light guide base are integrally fixed, there is no undue stress on the protective tube even when the handpiece body is used at various angles, and this prevents damage to the protective tube. is prevented. Furthermore, if the handpiece main body and the laser light guide base include a supply conduit for a cooling medium such as water and air as in the embodiment, the functionality is enhanced, the whole becomes extremely compact, and the operability is further improved. The present invention having such remarkable advantages is extremely useful.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway longitudinal sectional front view showing an example of the free rotation mechanism in the laser handpiece of the present invention, and FIG. 2 is a vertical sectional view taken along the line -- in FIG. Explanation of symbols, 1...Handpiece body, 11...Female tube, 12...Cooling water passage, 2...Laser light guide base, 21...Male tube, 22...Presser foot, 23...Tightening screw, 24...Cooling water Passage, 25... Circumferential groove, 3... Laser fiber, 31... Gap, 32... Air pipe line,
4... Protection tube, 41... Elastic tube, 5... Cylindrical bearing, 6... Attachment/detachment operation ring, 7... Head part.

Claims (1)

[Claims for Utility Model Registration] 1. A handpiece body 1, a laser light guide base 2 coaxially connected to the base end of the handpiece body 1 in a male-female relationship, and the light guide base 2 and the body 1. A laser fiber 3 is inserted along the axis of the laser fiber 3, and a laser fiber 3 is fitted in the light guide base 2 with a gap 31 as a passage for cooling air around the laser fiber 3. Protection tube 4 integrally fixed to light guide base 2
and a cylindrical bearing 5 interposed between the connecting female cylinder 11 of the main body 1 and the connecting male cylinder 21 of the light guide base 2 in order to allow the main body 1 and the light guide base 2 to rotate freely. Free rotation mechanism of laser handpiece. 2 The laser light guide base 2 is a light guide base main body 2
0, an elastic tube 41 tightly fitted in the middle of the circumferential body of the protective tube 4, and an elastic tube 41 that surrounds the elastic tube 41 together with the light guide base main body 20 and is attached to the circumferential body of the protective tube 4. The presser foot 22 includes a presser foot 22 that is slidably fitted along the longitudinal direction, and a tightening screw 23 that applies a pressing force to the presser foot 22, and the presser foot 22 is pressed by tightening the tightening screw 23. Registration of a utility model in which the elastic tube 41 is deformed by applying pressure, and the expansion force of the elastic tube 41 in the radial direction accompanying this deformation is used to integrally fix the light guide base main body 20 and the protective tube 4. A mechanism according to claim 1. 3. The mechanism according to claim 1 or 2, wherein the gap 31 communicates with the air pipe 32 in the handpiece body 1. 4 Cooling water passages 12 and 24 are provided inside the handpiece body 1 and the laser light guide base 2, and these passages 12 and 24 communicate with each other via a circumferential groove 25 at a connecting portion. A mechanism according to any one of claims 1, 2, or 3 of the utility model registration claim. 5. The mechanism according to claim 1, wherein a head portion 7 is detachably attached to the distal end of the handpiece body 1 via an attachment/detachment operation ring 6.